Water repellent yet vapor permeable: Stone wool is water repellent yet vapor permeable. Roxul insulation does not absorb water or hold moisture. Its unique stone wool orientation is ideal for repelling and draining water away from the exterior walls, industrial pipe, interior walls, or whatever Roxul insulation is protecting. And, since Roxul insulation does not absorb water, it will not sag or lose its shape, and will retain its R-value. So the R-value installed today, will be the same for years to come.Completely resistant to mold, mildew, rot and bacterial growth.

Easy to Cut and Install for Optimal Fit: allows you to accurately trim the insulation to the wall or ceiling cavity--and get an optimal fit around electrical boxes, wiring, plumbing and ductwork. The result is better R-value and maximum sound absorption.

Fire Resistant: Its unique composition won't burn or release toxic gases or smoke when exposed to high heat. Roxul offers a barrier that can delay the spread of fire and provide your family with precious extra minutes to escape. And it can withstand temperatures of up to 2150°F (1177°C)--well above heat levels of typical house fires.